Preparation and Microwave Absorbing Properties of MoS2/CoFe/C Composite

doi:10.11901/1005.3093.2020.486

Chinese Journal of Materials Research

2021, Vol. 35

Issue (12): 925-932 DOI: 10.11901/1005.3093.2020.486

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Preparation and Microwave Absorbing Properties of MoS₂/CoFe/C Composite

ZHANG Yuan, JI Zhijiang(

), XIE Shuai, WANG Jing, SI Tiantian

China Building Material Academy, State Key Laboratory of Green Building Materials, Beijing 100024, China

Cite this article:

ZHANG Yuan, JI Zhijiang, XIE Shuai, WANG Jing, SI Tiantian. Preparation and Microwave Absorbing Properties of MoS₂/CoFe/C Composite. Chinese Journal of Materials Research, 2021, 35(12): 925-932.

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Abstract

The composite absorbing material of MoS₂/CoFe/C was prepared via a two-step process, namely, the MoS₂/CoFe₂O₄ was hydro-thermally synthesized with anhydrous glucose as carbon source and reducing agent in a reasonable material ratio, which then was reduced to MoS₂/CoFe/C of ternary-nanometer flower structure in nitrogen atmosphere. The morphology, phase structure and electromagnetic parameters of the ternary nanomaterial were characterized, while the relation of the optimum matching thickness and absorbing property of the composite was assessed with computer simulation. The effect of glucose concentrations on the composition and properties of the composites were investigated. The absorption mechanism was discussed based on the Relaxation Polarization theory. When the thickness is 3 mm the lowest reflectivity of MoS₂/CoFe/C composite material at 12.4 GHz can reach -42.9 dB. When the thickness is 4 mm the reflectivity frequency of MoS₂/CoFe/C composite material is lower than -10 dB with bandwidth up to 7.1 GHz.

Key words: composite electromagnetic wave absorbing materials hydrothermal reaction magnetic nanoparticles dielectric loss

Received: 12 November 2020

ZTFLH:

TB333

Fund: the 14th Five-Year Plan Pre-research Project of State Key Laboratory of Green Building Materials(ZA-23)

About author: JI Zhijiang, Tel: (010)51167119, E-mail: jzj1964@sina.com

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	Yuan ZHANG
	Zhijiang JI
	Shuai XIE
	Jing WANG
	Tiantian SI

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https://www.cjmr.org/EN/10.11901/1005.3093.2020.486 OR https://www.cjmr.org/EN/Y2021/V35/I12/925

Fig.1 XRD patterns of MoS₂/CoFe₂O₄ and MoS₂/CoFe/C composites

Fig.2 SEM images taken from of the MoS₂/CoFe₂O₄ (a), MoS₂/CoFe/C-0.234 (b), MoS₂/CoFe/C-0.468 (c), MoS₂/CoFe/C-0.702 composites (d) and EDS mappings of MoS₂/CoFe/C-0.468 composite showing the distribution of the Mo, S, C, Fe and Co elements (e~j)

Fig.3 Reflection loss ofMoS₂/CoFe₂O₄ (a), MoS₂/CoFe/C-0.234 (b), MoS₂/CoFe/C-0.468 (c) and MoS₂/CoFe/C-0.702 composites (d)

Fig.4 Magnetic hysteresis loops of MoS₂/CoFe/C composites (a) and Raman spectra of MoS₂/CoFe/C composites (b)

Fig.5 Real part $ε'$ , imaginary part $ε ″$ and dielectric loss $t a n ? δ e$ of complex permittivity, real part $μ'$ , imaginary part $μ ″$ and magnetic loss $t a n ? δ μ$ of complex permeability of MoS₂/CoFe₂O₄ and MoS₂/CoFe/C composites

Fig.6 Cole-Cole curves of MoS₂/CoFe₂O₄ (a) and MoS₂/CoFe/C-0.234 (b), MoS₂/CoFe/C-0.468 (c) and MoS₂/CoFe/C-0.702 (d)

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